Gas pressure differential-measuring system orifice fitting



FIG. 1 is a reduced perspective view of a gas pressure differential measuring system orifice fitting showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image thereof; and

FIG. 4 is a bottom plan view thereof.

The pipes are shown broken away in FIGS. 1, 2 and 4 to indicate indeterminate length. 

The ornamental design for a gas pressure differential-measuring system orifice fitting, as shown and described. 